*
* - Beware: This file MUST parse without errors on even the most ancient of browsers!
*/
-/* eslint-disable vars-on-top, no-unmodified-loop-condition */
-/* global mw, isCompatible, $VARS, $CODE */
+/* eslint-disable no-implicit-globals, vars-on-top, no-unmodified-loop-condition */
+/* global $VARS, $CODE */
/**
* See <https://www.mediawiki.org/wiki/Compatibility#Browsers>
*
* Other browsers that pass the check are considered Grade X.
*
- * @param {string} [str] User agent, defaults to navigator.userAgent
+ * @private
+ * @param {string} ua User agent string
* @return {boolean} User agent is compatible with MediaWiki JS
*/
-window.isCompatible = function ( str ) {
- var ua = str || navigator.userAgent;
+function isCompatible( ua ) {
return !!(
// https://caniuse.com/#feat=es5
// https://caniuse.com/#feat=use-strict
// https://caniuse.com/#feat=json / https://phabricator.wikimedia.org/T141344#2784065
( function () {
'use strict';
- return !this && !!Function.prototype.bind && !!window.JSON;
+ return !this && Function.prototype.bind && window.JSON;
}() ) &&
// https://caniuse.com/#feat=queryselector
// https://caniuse.com/#feat=addeventlistener
'addEventListener' in window &&
- // Hardcoded exceptions for browsers that pass the requirement but we don't want to
- // support in the modern run-time.
- // Note: Please extend the regex instead of adding new ones
+ // Hardcoded exceptions for browsers that pass the requirement but we don't
+ // want to support in the modern run-time.
+ //
+ // Please extend the regex instead of adding new ones!
+ // And add a test case to startup.test.js
!ua.match( /MSIE 10|webOS\/1\.[0-4]|SymbianOS|Series60|NetFront|Opera Mini|S40OviBrowser|MeeGo|Android.+Glass|^Mozilla\/5\.0 .+ Gecko\/$|googleweblight|PLAYSTATION|PlayStation/ )
);
-};
+}
-( function () {
- var NORLQ;
+if ( !isCompatible( navigator.userAgent ) ) {
// Handle Grade C
- if ( !isCompatible() ) {
- // Undo speculative Grade A <html> class. See ResourceLoaderClientHtml::getDocumentAttributes().
- document.documentElement.className = document.documentElement.className
- .replace( /(^|\s)client-js(\s|$)/, '$1client-nojs$2' );
+ // Undo speculative Grade A <html> class. See ResourceLoaderClientHtml::getDocumentAttributes().
+ document.documentElement.className = document.documentElement.className
+ .replace( /(^|\s)client-js(\s|$)/, '$1client-nojs$2' );
- // Process any callbacks for Grade C
- NORLQ = window.NORLQ;
- while ( NORLQ && NORLQ[ 0 ] ) {
- NORLQ.shift()();
+ // Process any callbacks for Grade C
+ while ( window.NORLQ && window.NORLQ[ 0 ] ) {
+ window.NORLQ.shift()();
+ }
+ window.NORLQ = {
+ push: function ( fn ) {
+ fn();
}
- window.NORLQ = {
- push: function ( fn ) {
- fn();
- }
- };
+ };
- // Clear and disable the Grade A queue
- window.RLQ = {
- push: function () {}
- };
+ // Clear and disable the Grade A queue
+ window.RLQ = {
+ push: function () {}
+ };
+} else {
+ // Handle Grade A
- return;
+ if ( window.performance && performance.mark ) {
+ performance.mark( 'mwStartup' );
}
+ // This embeds mediawiki.js, which defines 'mw' and 'mw.loader'.
+ $CODE.defineLoader();
+
/**
* The $CODE and $VARS placeholders are substituted in ResourceLoaderStartUpModule.php.
*/
- function startUp() {
+ ( function () {
+ /* global mw */
mw.config = new mw.Map( $VARS.wgLegacyJavaScriptGlobals );
$CODE.registrations();
mw.config.set( $VARS.configuration );
// Process callbacks for Grade A
- // Must be after registrations and mw.config.set, which mw.loader depends on.
var queue = window.RLQ;
- // Redefine push(), but keep type as array for storing callbacks that require modules.
+ // Replace RLQ placeholder from ResourceLoaderClientHtml with an implementation
+ // that executes simple callbacks, but continues to store callbacks that require
+ // modules.
window.RLQ = [];
/* global RLQ */
RLQ.push = function ( fn ) {
}
};
while ( queue && queue[ 0 ] ) {
- // Re-use our push()
+ // Re-use our new push() method
RLQ.push( queue.shift() );
}
window.NORLQ = {
push: function () {}
};
- }
-
- if ( window.performance && performance.mark ) {
- performance.mark( 'mwStartup' );
- }
-
- // This embeds mediawiki.js, which defines 'mw' and 'mw.loader'.
- $CODE.defineLoader();
-
- startUp();
-}() );
+ }() );
+}